To activate Trolling Angles, you must purchase an Elite permanent license or a Premium subscription. You must also read and accept the Terms of Service agreement for each new installed Trolling Angles version.

At startup, the app will present an “Activate Trolling Angles” button on the main screen, which leads to the Upgrade panel. The Upgrade panel may also be reached from the Settings icon (gear) in the top toolbar of the main page.

The Premium Monthly subscription starts with a one month free trial period before the Google Play Store or Apple App Store charges you. You can cancel your subscription before the renewal date without penalty.